Never mind, I figured it out!
For anyone who wants to do this, go into resources->business-hours.css and change:
.business_hours_has_exception td.business_hours_table_open, .business_hours_has_exception td.business_hours_table_close, .business_hours_has_exception td.business_hours_table_closed {
text-decoration : strikethrough;
}
to
.business_hours_has_exception td.business_hours_table_open, .business_hours_has_exception td.business_hours_table_close, .business_hours_has_exception td.business_hours_table_closed {
display : none;
}